Delivery-guard for paper-feeding machines



No. 625,094. Patented May 16, I899.

T. (LDEXTER.

DELIVEBYBUARB FDR PAPER FEEDINGMAGHINES.

, (Application filed July 2s, 1a9s. (No Model.) l7 Sheets-Sheet I.

' r mvamon 1% 473% WITNESSES 4 ATTORNEY EH5 $0., PHOTDJJTHQN WASNINGTON D c No. 625,094. Patented ma 5,1899.

1". c. DEXTER.

DELIVERY GUARD FOB PAPER FEEDING MACHINES.

[Application filed July 25, 1896.) E (No Model.) l7 Sheets-Sheet 2.

WITNESSES: v INVENTOR wcu m fl ga My ATTORNEY me norms PETERS co. PNOTQLITNQ, wAsulncnum u. c.

No. 625,094. Patented May l6, mes. T. c. DEXTER.

DELIVERY GUARD FOR PAPER FEEDING MACHINES.

(Application filed July 25, 1898:) (No Modal.)

l7 Sheefs-5heet 3.

WITNESSES: INVENTOR 4 My; Q /MM AT'FQRNEY THE NORRIS PETERS cu, PmfiaLm-m" wasmuafum a. c.

Patented May l6, I899.

T. C. DEXTER. DELIVERYGUABD BOB PAPER FEEDlNG-MA6HINES.

(Application filed July 25, 1898.) (No Model.) l7 Sheets-8hfiei 4.

INVENTOR.

ATTORNEY s 00'. PHOTOLITHO" WASHINGTON o c No. 625,094. Patented May l6, I899.

T. C. DEXTER.

DELIVERY GUARD FOR'PAPER FEEDING MACHINES.

(Application filed July 25, 1898.) (No Model.) I7 Sheets-Sheet 5.

INVENTOR A 51 ya ATTORNEY WITNESSES:

Patented May "sf-I899 T. c. DEXTER. DELIVERY GUARD FOR PAPER FEEDING MACHINES.

(Applicatiu; filed July 25, 189B.) (No Model.) l7 Sheets-Sheei 6.

WITNESSES:

A ATTORNEY No. 625,094. Patented May [6, I899.

T. c. DEXTER. DELIVERY GUARD FOR PAPER FEEDING MACHINES.

(Application filed July 25 1898.) Mo Modal.)

l7 Sheets-8heet 7.

WITNESSES:

I NYENTOR Mfi M AWAL f 21% ATTORNEY DELIVERY GUARD FOB PAPER FEEDING MACHINES.

(Application'mod .hily' 25, 1898.) (No Model.) l7 Sheets-Sheet 81.

JZy/ WITNESSES: INVENTOR 40. 4. I ATTORNEY "m: Nunms warms co.. mom-urnofl WASHINGTON. 0 cv No. 625,094. Patented May "5,1899.

T. c. DEXTER.

DE-LW'EBY GUARD "FOR PAPER FEEDING MACHINES.

(Application filed July 25, 1898.) (No Model.) l7 Shaets-Sheet 9.

INVENTOR WMZ 4 ATTORNEY No. 625,094. 7 Patented May l6, I899. T. C. DEXTER.

DELIVERY GUARD FOB PAPER FEEDING MACHINES.

(Application filed July 25, 1398. (No Model.) l7 Sheets-Sheet ID.

WITNESSES: INVENTOR g. g 16 No. 625,094. Patented May l6, I899. T. C. DEXTER.

DELIVERY GUARD FOR'PAPERFEEDING MACHINES.

(Application filed July 25, 1898.) (No Model) l7 Sheefs-Sheet II.

A INVENTOR ATTORNEY WITNESSES:

No. 625,094. Patented May I6, I899.

T. b. "DEXTER.

DELIVERY GUARD FOB PAP-ER FEEDING MACHINES. (Application filed July 25, 1898.) (No Model.) 17 Shaets$h00t I2.

.I I 7% 9 f A INVENTOR //%%1L Ak zz ATTORNEY No. 625,094. Patented May [6, I899.

T. C. DEXTER.

DELIVERY GUARD FDR PAPER FEEDING MACHINES.

(No Model.) l7 sham-sheet l3.

L II

I I I I I I H II 2 II I: I I II I: I II I I I I I allI I I I A L IIII I 41 IIIIII I I w I II K; II II NI I I II Infill II I H I I I IIIII v II N II I w I 3 I IIIII I 3 II I- Q I I III II I K I I m I II I I 1 RI 3 I I II E I I I I I [I IIlII I N II I I I 42 I i II I N I I I I I I I II I I I II I I II I II II I I ,I I anN III it- S m m I NVQW Q Q WITNESSES: INVE'NTOR I geg ATTO NEY I Patented May l6, I899. T. c. max-ran. DELIVERY GUARD FOR PAPER FEEDING MACHINES.

(Application filed July 25, 1898.) (No Model.) l7 Sheats-$haef l4.

INYEN'TOR WITNESSES:

a ATTORNEY THE Noam: PsTzas 00.. PHQTQUTHQ. wAsumaTou. u. c.

No. 625,094. Patented'May I6, I899. T. c. DEXTER. DELIVERY GUARD FOB PAPER FEEDING MACHINES.

(Application filed July 26, 1898.) (No Model.) l7 Sheets$heet IS.

/\ INVENTOR m 49m WITNESSES: Sfi- 51 ATTORNEY N0. 625,094. Patented May l6, I899.

T. C. DEXTER. DELIVERY GUARD FDR PAPER FEEDING MACHINES.

(Application filed July 25, 1898.)

(No Model.) ITSheets-Sheet l6.

I WITNESSES: w A INVENTOR /M%yfl awwg .i ATTORNEY No. 625,094." Patented May 16, 18991,

Tjc. DEXTER.

DELIVERY GUARD FOB PAPER FEEDING MACHINES.

(Application filed July 26, 1898.)

(No Model.) 17 Sheets-Sheet I7.

WITNESSES: p INYAENTOR ATTORNEY NiTgED STATES PATENT OFFIC TALBOT C. DEXTER, OF PEARL RIVER, NEYV YORK.

DELIVERY-GUARD FOR PAPER-FEEDING MACHINES.

SPECIFICATION forming part of Letters Patent No. 625,094, dated May 16, 1899.

Application filed July 25, 1898. Serial No. 686,817. (No model.)

To all whom it 7171a, concern.-

Be it known that I, TALBOT C. DEXTER, of Pearl River, in the county of Rockland, in the State of New York, have invented new and useful Improvements in Delivery-Guards for Paper-Feeding Machines, &c., of which the following, taken in connection with the ac coinpanying drawings, is a full, clear, and exact description. h

This invention relates to the automatic transmission of paper from a feeding-machine to either a printing'press, paper-folding machine, or other machine designed to operate on one sheet of paper ata time.

The object of the invention is to protect from injury the paper-receiving machine in case the feeding-machine either feeds two or more sheets simultaneously or fails to deliver a sheet therefromyand to that end the invention consists, essentially,of paper-calipering mechanism on the feeding-machine actuated automatically by the excessive thickness of a plurality of sheets entering simultaneously between the calipering devices, and thereby preventing the delivery of said sheets to the paper'receiving machine, in combination with mechanical feelers disposed between said feeding-machine and receiving-machine to be actuated by the sheetin transit and arrest the action of said receiving-machine in case of failure in the delivery of the paper from the feeding-machine, all as hereinafter more fully described.

I have in the annexed drawings shown my present invention chiefly in connection with a printin g-press, in which it is especially essential to prevent the bare tympan or face of the impression-cylinder from coming in contact with the inked form carried on the pressbed in case the feeding-machine fails to supply the required sheet of paper to be printed and to also prevent entrance of a plurality of sheets simultaneously between the impression-cylinder and the form on the press-bed, and thus obviate strain and injury to the press and type.

In said drawings, Figure 1 is a side elevation of my invention employed for automatically shifting the belt and arresting the H10- tion of a drum-cylinder press. Fig. 2 is an enlarged front elevation of the same. Fig. 3 is an enlarged horizontal section taken under the impression-cylinder and showing more clearly the belt-shifting mechanism. Fig. 4 is a still further enlarged perspective view of the tripping mechanism which controls the aforesaid belt-shifting mechanism. Fig. 5 is a side elevation of the paper-feeding machine, showing the arrangement of the clutch mechanism, which is controlled by the paper-calipering devices. Fig. 6 is an enlargeddetail View of the said clutch. mechanism.

Fig. 7 is an enlarged deail view of the paper-calipering device. Fig. Sis a diagrammatic side view of the drum-cylinder press, showing the means for restoring to their normal position the devices which control the operation of the printing-press. Fig. 9 is a side elvation of a drum-cylinder press operated by an electric motor and showing my invention employed for controlling said motor. Fig. 10 is an enlarged horizontal section taken immediately below the impression-cylinder of the aforesaid electrically-operated press. Fig. 11 is a side elevation of a two-revolution press and its connection with a paper-feeding machine,-showing my invention employed for automatically tripping the impression-cylinder casein the feeding-machine fails to supply the paper. Fig. 12 is an enlarged side view of the automatic sheet-switching devices shown in their normal position. Fig. 13 is a plan view of the same. Fig. 14 is an enlarged side view of the aforesaid sheet-switching devices in their operative position. Fig. 15 is a side view of a modification of the mechanism for transmitting motion to the sheet-switching devices. Fig. 16 is an'enlarged horizontal section on line X X in Fig. 11, showing the portion of the printing-press to which the cylinder-tripping devices are connected. Fig. 17 is an enlarged detail side view of the mechanical feeler which electrically controls the aforesaid cylinder-tripping devices. Fig. 18 is a side view of my improved sheet-switching devices applied to the receiving end of a paperfolding machine; and Fig. 19 is an enlarged detail plan view of the automatic throw-out mechanism employed for arresting the motion ofa feeding-machine, as shown in Fig. 6. Similar letters and numerals of reference indicate corresponding parts.

A represents a paper-feedingmachine,which may be of any suitable construction. In the present case the feeding devices proper are represented in the form of arms 22 22, pivoted to a reciprocating carriage 23 and equipped on their free ends with rubber pads 24:, by means of which they push the top sheet from the pile to the delivery end of the machine during the forward movement of said carriage. The machine designed to receive the paper from said feeding machine may be either a printing-press (represented at P in the drawings) or a paper-folding machine, as shown in Fig. 19 of the drawings, or other machine designed to operate on paper supplied thereto one sheet at a time.

When my invention is to be used in connection with a printing-press, the paper-feeding machine is to be placed at the elevated or rear end of the feed-board B, and the paper is to be conveyed from the feeding-machine to the printing-press by means of traveling tapes a, extending lengthwise over the feedboard.

The first object of the invention is to prevent two or more sheets of paper from passing simultaneously from the feeding-machine A to either the printing-mess P or a paperfolding machine 0 or other machine. T0 attain said object, I employ at the delivery end of the feeding-machine automatic paper-calipering devices, which are actuated by the excessive thickness of a plurality of sheets passing through said devices, which action may be utilized to arrest further delivery of paper from said machine. I prefer, however, to employ said calipering devices for switching said plurality of sheets out of the path leading to the papereonveying tapes a, as hereinafter described. Said calipering devices consist, mainly, of a calipering-lever b, disposed longitudinally over the passage of the paper from the feeding-machine and fulcrumed at Z) on a bracket mounted on a cross-bar b secured to thesides of the main frame A of the feeding-machine. Said lever b is formed with a forwardly-extending calipering-nose b and the rear end of said lever is formed with an upward extension I), terminating with a forwardly-projecting hook I)", which engages a rearwardlyextending heel b of a contact-lever b pivoted to an arm b projecting rearward from the bracket b as more clearly shown in Figs. '7 and 14 of the drawings. The forward end portion of the said contact-lever is formed with a depression terminating with an upward and rearward projection, and over said depression is a spring-tongue 0, attached at one end to the contact-lever, back of the depression thereof, and having its free end bearing normally on the under side of the rearward projection c of the leverf Said spring-tongue is electrically connected to one of the circuit-wires 0 The lever 19 rests normally on a stop 0 attached to the bracket 19 Over the free end of the spring-tongue c is an adjustable contact-screw 61, connected to a bracket d, at-

tached to the bracket b Said screw is elec trically connected with the other circuitwire d The described spring-tongue c and-contactscrew (1, in connection with the caliperinglever b, constitute a circuit maker and breaker which is employed for automatically controlling the delivery of paper from the feedingmachine, as hereinafter described.

Directly under the calipering-nose b of the lever b is the vertically-movable caliperingbolt cl which is forced upward by a spring 30 and has attached to it a stop-collar 31, which limits the upward movement of said bolt, so as to carry the top thereof even with the plane of feed of the sheets.

e represents a rock-shaft to which are fastened three arms 6, c and 6 The arm 6 bears on top of a heel projecting from the foot of a calipering-bolt d The free end of the arm 6 has connected to it the lower end of a rod 6 to the upper end of which is pivoted a roller 6 riding on a cam D, fastened to a rotary shaft D. This cam is so shaped and timed in its movement as to impart a properly-timed intermittent reciprocating motion to the rod 6 and a corresponding rocking motion to the shaft 6. The arm 6 is connected to an upwardly-forced spring-actuated rod 6 which serves to hold the roller 6 in workin g relation with the cam D. This causes the arm e to intermittently depress the cali pering-bolt d to allow the paper-feeding devices to introduce the paper between the top of said bolt and the nose Z) of the registeringlever 12.

In the operation of the feeding-machine the bolt d is allowed to rise before the paper adtoo vanced from the pile reaches the sheet-delivering drop-rollers I and while the paper is for a moment at rest, and in case two or more sheets have accidentally entered simultaneously between the top of the bolt d and nose I) the excessive thickness of paper causes the calipering-lever to be tilted so as to close the electric circuit by throwing the spring-tongue 0 into contact with the terminal or contact screw 61. This automatic circuit maker and breaker I utilize to control the delivery of paper from the feeding-machine, so as to prevent a plurality of sheets from being delivered simultaneously to the paper-conveying tapes a, which carry the paper to the printing-press or other machine designed to receive one sheet at a time. This control of the delivery of paper may be effected in the manner described in my prior application for Letters Patent, in which the aforesaid closing of the electric circuit is utilized to prevent the sheetdelivering drop-rollers I from engaging the plurality of sheets that may have accidentally become interposed between the calipering devices.

To the shaft D is fastened the cam D ,which actuates the drop-rollers I I, by means of a rod f, having pivoted to one end a roller f, by which it rides on said cam. The opposite end of said rod is connected to an arm f rigidly secured to the shaft P, to which are fastened the arms f carrying on their free ends the aforesaid drop-rollers, which connections were heretofore made as shown in Figs. 0 and 7 of the drawings; but when the duplicate sheets are to be switched from the conveyingtapes a said connections are preferably made as represented in Figs. 12 and 14 of the drawings.

To prevent the drop-rollers I I from descending and engaging or bearing on the plurality of sheets advanced accidentally at the same time on the feeding-machine, as hereinbefore stated, the drop-roller-actuating cam D receives its motion through clutch mechanism engaging the drivinggear D (indicated by dotted line,) mounted loosely on the shaft of said cam, as described in my prior application for Letters Patent aforesaid. Said clutch mechanism and the means for controlling the same automatically by the papercalipering devices, briefly stated, are constructed mainly as follows:

A gear-wheel D receiving rotary motion from the actuating-gears of the feeding-machine, is mounted loosely on the shaft D, to which the drop-roller-actuating cam D is fastened. Said gear-wheel has rigidly attached to its side a cl utch-disk D at the side of which is a corresponding disk D fastened to the shaft D. Said disks are provided in their peripheries with notches which register with each other once during the revolution of the disk D, driven by the gear-wheel D To the fixed disk D is pivoted a clutchdog D extending in opposite directions from its pivot and shaped at one endto engage the two notches of the disks D and D when said notches are in registering positions. The opposite end or heel of said dog is connected by a spring-actuated rod D which rod serves to normally force the dog to a position to engage the clutch-disks, as aforesaid. The heel of said dog is provided with a lug D which during the rotation of the disk D traverses a sliding bolt D sustained on the frame of the feeding-machine. The contact of said bolt with the lug D traversing the bolt, causes the dog D to be thrown out of engagement with the notches of the clutch-disks, and thus arrest the motion of the cam D which actuates the drop-roller.

A shaft 9 has projecting from it an arm g, which is suitably connected with the bolt D to cause the said bolt to be moved to and from the path of the dog D by the rocking of said shaft, which may be effected bya handlever 9 attached to the shaft and operated by the person in charge of the machine.

hen the feeding-machine is set in motion, the operator moves the lever g so as to set the bolt D out of the path of the dog 1) to leave the same interlocked with the clutchdisks and cause the drop-rollers to operate in their required order. To automatically trip said dog to release the clutch-disks and retain the drop-rollers in their elevated position in case two or more sheets are advanced simultaneously on the feeding-machine, the hereinbefore described calipering devices, with the circuit maker and breaker, is employed. For this purpose the shaft g is provided with an arm 9 from which depends a bar 9 the main portion of which is parallel with and in proximity to the rod f, which receives reciprocating motion from the cam D and actuates the drop-rollers. The lower end of the bar 9 slides in a vertical guide 9 attached to the frame of the machine. To the bar g is pivoted a dog g, facing a shoulder g on the rod f. A spring g pushes said dog toward the shoulder. The pivoted end of said dog is formed with a laterally-projecting heel, opposite to which is the hook-shaped end of a latch h, pivoted to the lower portion of the bar 9 and formed with a lateral projection, to which is attached the armature of an electromagnet 9 disposed under said latch and carried on the bar 9 Said magnet is in circuit with the hereinbeforedescribed circuit maker and breaker, and the result is that in case the circuit is closed by two or more sheets of paper entering simultaneously between the calipering devices the said magnet is energized and by attracting its armature it tilts the latch It, so as to cause it to release the dog 9 which is then forced by the action of the spring g into a position to engage the shoulder g on the rod f, the downward movement of which pushes down with it the bar 9 which latter turns the shaft g, so as to cause its armg to push the bolt D into a position to engage the lug D of the clutch-dog D during the rotation of said clutch-disks. Said dog is thuscaused to release said disks and arrest the motion of the cam D which actuates the drop rollers. Hence the delivery of paper from the feedingmachine is automatically arrested. h denotes a hand-lever connected to the dog 9 for resetting said dog after the machine has been tripped. However, I have found in practice that it is preferable to automatically prevent the delivery of a plurality of sheets simultaneously from the feeding-machine to the paper-conveying tapes a a without arresting or interfering with the movement of the feedingmachine. To accomplish this, I have devised novel paper-switching devices which cast the misfed or duplicate sheets out of the path leading from the delivery end of the feedingmachine to the aforesaid tapes, which switohing devices are controlled in their action by thehereinbefore-described automatic papercaliperin g devices. To accommodate the said paper-swi tchin g device, I place the rear tapecarrying roller F a sufficient distance from the paper-delivering roller 1 to leave between them a spacefor the downward escape of the misfed paper. This space is bridged by a series of longitudinal switch-fingers 77 fastened to a transverse shaft 7L3, journaled in bearings on the sides of the frame A. The 

